CN101215051B - Minitype sea water desalination system water treatment technique - Google Patents
Minitype sea water desalination system water treatment technique Download PDFInfo
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- CN101215051B CN101215051B CN2008100592367A CN200810059236A CN101215051B CN 101215051 B CN101215051 B CN 101215051B CN 2008100592367 A CN2008100592367 A CN 2008100592367A CN 200810059236 A CN200810059236 A CN 200810059236A CN 101215051 B CN101215051 B CN 101215051B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention provides a water treatment technique of a small-sized sea water desalination system, which includes the following steps: step 1, causing the sea water to enter a primary filter via a booster pump to remove big particle size foreign material, step 2, employing two parallel filters to further remove the foreign material with the particle size bigger than 100mu m, the water inlets of the two filters are equipped with electric triple valve, according to the designed backwash time sequence of a ultrafiltration device, alternately self-backwashs the two filters via the adjustment of the electric triple valves, step 3, the outlet water from the self-backwash filter is treated by the ultrafiltration device and the SDI value is equal or smaller than 3, which reaches the need of reverse osmosis well water, step 4, the ultrafiltration water enter reverse osmosis components to be treated via the pressure boost, the filtration of the security filter and the water pressure lift to theneed of the water inlet pressure of the reverse osmosis components by a high pressure pump, recycle the energy of the reverse osmosis water and the recycled energy is used for the work of the high pressure pump. The invention has the advantages of simple device, low cost, easy replacement and low energy consumption and operation cost.
Description
Technical field
The present invention relates to a kind of small-sized sea water desaltination treatment process.
Background technology
Along with the continuous progress of desalination technology, ask for fresh water to the sea, alleviate the worldwide water crisis that is on the rise, not only build consensus in global scientific and technological circle, the government that has also become the country that respectively borders on the sea advocates and the countermeasure of developing new water source.Desalination technology is used in 124 countries and regions in the world at present.The research and development of desalination technology are still in the ascendant.
The situation of the peripheral seawater quality of China's Coastal Areas (comprising the island) allows of no optimist at present, particularly is subjected to the influence in river, continent, and the turbidity in the seawater is very high.The sea water desaltination common process is pre-treatment with sloping plate deposition, quartz sand filtration, though the water inlet requirement of brine disposal to the film processing unit can be taken up an area of greatly the equipment heaviness.
On the other hand, current consumption is the important factor of restriction seawater desalination system application.Seawater desalination system recuperator commonly used mainly contains two kinds at present, and the one, turbine type energy recovery technology, this process efficiency is lower, generally between 35-76%; Another kind is a positive displacement formula energy recovery technology, and this technology organic efficiency is between 91-96%, but the equipment configuration is complicated, to the job requirement height of operation and maintenance.
To sum up, present desalination process complexity, and cause the equipment heaviness, and desalination energy consumption height, the miniaturization sea water desaltination that is unsuitable for the coastal seawater quality of present China is handled.
Summary of the invention
Technical problem to be solved by this invention provides a kind of minitype sea water desalination system water treatment technique that adapts to high turbidity, small-scale brine disposal.For this reason, the present invention by the following technical solutions, it may further comprise the steps:
Step 1, seawater is entered coarse filter by the submersible pump supercharging handle, to remove the foreign material of big particle diameter;
Step 2, employing two strainers in parallel are handled, and filtering accuracy is further removed the foreign material of particle diameter greater than 100um less than 100 μ m; Electric T-shaped valve is respectively disposed in water inlet place of two strainers, and in the ultra-filtration equipment backwash, by the adjustment of electric T-shaped valve, described two strainers wheel is changed to the other side's backwash;
The water outlet of step 3, described strainer is handled through ultra-filtration equipment, makes to produce water SDI value less than 3, reaches the requirement of feed water by reverse osmosis;
Step 4, ultrafiltration are produced water and are filtered through topping-up pump supercharging, security personnel's filter, by high-pressure pump hydraulic pressure are promoted to and satisfy the requirement of reverse osmosis module intake pressure, enter reverse osmosis module and handle; Reverse osmosis concentrated water is carried out energy recovery, and institute's recovered energy is used for the work of high-pressure pump.
When adopting technique scheme, the present invention also can adopt following further technical scheme:
In step 1, it adopts the coarse filter of plural serial stage to handle.
In step 3, the product water of ultra-filtration equipment enters the intermediate water tank water storage, and intermediate water tank divides the two-way water outlet, and one the tunnel advances the topping-up pump supercharging through step 4, and another road direction ultra-filtration equipment provides backwash water.
In step 4, adopt axial-piston recuperator recovered energy, the motor of high-pressure pump adopts dual-axle motor, and the energy that is reclaimed is in the axle of a wherein end of dual-axle motor.
In step 4, also in reverse osmosis produced water lines, add adjusting material and sterilant, optimize water quality.
Because adopt technical scheme of the present invention, the present invention has the following advantages:
1, complex optimum adopts coarse filtration, reflexive washing filter, ultrafiltration to carry out pre-treatment.At different raw water turbidities, can adopt the coarse filter in different apertures, to the former water of high turbidity, also can use the coarse filter of plural serial stage.With traditional settling apparatus, filter plant is compared, and equipment is simple, and is with low cost, changes easy.
2, adopted brand-new from back-washing method.The present invention adopts the strainer of two parallel connections and disposes two electric T-shaped valves, in the time of the backwash of default subsequent ultrafiltration, two strainers are oppositely intake by T-valve and are reached from the backwash function, a large amount of suspended substances are in time drained, its filter core need not be changed, the whole service process is automatic, and running cost is almost nil.
3, the novel energy recovery method that is adopted can be integrated recuperator and high-pressure pump, makes the power of motor of high-pressure pump only need not have 1/3 of recuperator, and equipment is simple, and operation easily reduces use cost.
Description of drawings
Fig. 1 is the process flow sheet of small-sized seawater desalination system water treatment embodiment provided by the present invention
Fig. 2 is the system schematic of small-sized seawater desalination system water treatment embodiment provided by the present invention.
Fig. 3 is in the fundamental diagram of running status for reflexive washing filter.
Fig. 4 is in the fundamental diagram of backwash state I for reflexive washing filter.
Fig. 5 is in the fundamental diagram of backwash state I I for reflexive washing filter.
Fig. 6 is a reverse osmosis membrane of the present invention, the work synoptic diagram of high-pressure pump and recuperator.
Embodiment
With reference to accompanying drawing.Minitype sea water desalination system water treatment technique provided by the present invention may further comprise the steps:
Step 1: seawater is entered coarse filter 2 by submersible pump 1 supercharging, and bigger as turbidity of sea water to remove the foreign material of big particle diameter, coarse filter will be used plural serial stage.
In step 2, adopt two strainers in parallel to handle, electric T-shaped valve is respectively disposed in its water inlet place, according to the ultra-filtration equipment backwash sequential that sets, by the adjustment of electric T-shaped valve, strainer is carried out by turns from backwash.
Step 3: water outlet makes through ultra-filtration equipment 4 and produces water SDI value less than 3, reaches the requirement of feed water by reverse osmosis.Ultrafiltration is produced water and is entered intermediate water tank 5, regularly backwash of 6 pairs of ultrafiltration of an ad hoc backwashing pump, and ultrafiltration technology can be removed suspended substance, the molecule in the seawater continuously.Ultra-filtration equipment has little, the characteristics that can automated operation of volume.
Step 4: ultrafiltration is produced water and is delivered to security personnel's filter 8 through topping-up pump 7.The water outlet of security personnel's filter enters reverse osmosis module through high-pressure pump, and reverse osmosis concentrated water discharges behind recuperator 93.Add high-performance adjusting material and sterilant in the reverse osmosis produced water lines, behind water quality optimizing, enter and produce water water pocket 12.
In this technology, to remove the foreign material of big particle diameter, greater than 100NTU, coarse filter will be used two-stage tandem to seawater as turbidity of sea water by coarse filter, and filtering accuracy is descending, more than 100 μ m.The strainer filtering accuracy of two parallel connections is further removed the foreign material of relative small particle size less than 100 μ m.The ultrafiltration module molecular weight cut-off guarantees to produce water SDI value less than 3 between 50,000 to 100,000, reach the requirement of feed water by reverse osmosis.The hyperfiltration reverse-rinsing pump produces water to regularly backwash of ultrafiltration with ultrafiltration, and backwash needs the frequency height, and the water yield is big.In the time of hyperfiltration reverse-rinsing, produce the water backwash by another strainer from a strainer of backwash filtration unit.When backwash, stop in the pre-treatment short period of time supplying water, by the intermediate water tank regulating pondage.Reverse osmosis membrane adopts the seawater film, and the device ratio of desalinization is more than 99%, and the working pressure of water inlet is between 4.5-5.5MPa.Reverse osmosis concentrated water pressure is only less than about intake pressure 0.2MPa, and more than 90%, fresh water power consumption per ton can be controlled in the 4.0kwh through energy recovery.Add adjusting material and sterilant in the reverse osmosis produced water lines, behind water quality optimizing, reach national drinking water standard.
With reference to accompanying drawing 1-6, further describe the system that realizes above-mentioned water technology below in conjunction with accompanying drawing.
It is provided with coarse filter 2, by the strainer 3 of two parallel connections constitute from backwash filtration unit, ultra-filtration equipment 4, hyperfiltration reverse-rinsing pump 6, intermediate water tank 5, topping-up pump 7, security personnel's filter 8, high-pressure pump and recuperator 9, reverse osmosis unit 10, modifying device 11, product water water pocket 12; Described desalination process also is provided with generator and submersible pump 1.Generator does not draw in the drawings, and in the drawings, Y represents discharge outlet.
With reference to accompanying drawing.Submersible pump 1 joins with the water-in of coarse filter, has flexible pipe in its connecting pipeline, and the present invention can adopt the coarse filter 2 of single-stage coarse filter or plural serial stage; The coarse filter water outlet be connected from backwash filtration unit water-in, the water-in of described strainer 3 is connected to electric T-shaped valve 31; Connect ultra-filtration equipment 4 water-ins from backwash filtration unit water outlet, the ultra-filtration equipment water outlet is connected with the intermediate water tank water-in.With reference to accompanying drawing 4-6, the strainer 3 that it has shown two parallel connections is in the principle of work of running status and they and is in by turns principle of work from backwash; In Fig. 4, the strainer 3 of two parallel connections filters operation simultaneously, and the valve 103 on the pipeline is in open mode; As shown in Figure 5, when ultra-filtration equipment enters the backwash state, valve 103 cuts out automatically, electric T-shaped valve 31a is in the water inlet state of connecting, electric T-shaped valve 31b is in the connection emissions status, water enters the strainer 3 that is in the below from the strainer 3 that is in the top, and the strainer 3 that is in the below is carried out backwash; As shown in Figure 6, after strainer 3 backwashes below being in finish, by opposite direction the strainer 3 that is in the top is carried out from backwash again; When ultra-filtration equipment finished the backwash state, valve 103 was opened automatically, and the strainer 3 of two parallel connections also finishes backwash and resumes water supply.In Fig. 4-6, the direction of arrow is represented water (flow) direction.
With reference to accompanying drawing.Intermediate water tank outlet is connected with the two-way pipe: the one tunnel through the hyperfiltration reverse-rinsing pump to the ultra-filtration equipment backwash, another road is connected to security personnel's filter through topping-up pump; Security personnel's filter water outlet is connected with the high-pressure pump water-in; The high-pressure pump water outlet connects the reverse osmosis module in the reverse osmosis unit, and reverse osmosis unit produces the mouth of a river and is connected with product water water pocket.
The present invention also is provided with recuperator, it and high-pressure pump become one 9, the centre is a dual-axle motor 91, be the high-pressure pump pump housing 92 on one side, be recuperator 93 on one side, its principle of work is an axial-piston, reverse osmosis unit concentrated water spout 101 connects the dense water access port 94 of recuperator, the high-pressure thick water that reverse osmosis membrane unit is discharged promotes the piston motion of recuperator, piston motion produces mechanical kinetic energy and motor 91 comes together to drive high-pressure pump, when making power of motor only need not have recuperator 1/3, the dense water after releasing energy is by the discharging of recuperator discharge outlet.This boost in pressure and energy recovery only need an equipment to finish, and other forms of energy recovery all needs two or three equipment compositions, and equipment is simple, and it is little to take up room.In the drawings, drawing reference numeral 102 is the reverse osmosis unit water-in, and drawing reference numeral 95 is the water outlet of high-pressure pump.
The present invention also is provided with the modifying device 11 of adjusting material and sterilant, and the modifying device of described adjusting material and sterilant produces the mouth of a river with product water water pocket or reverse osmosis unit and links to each other with the connecting pipeline that produces the water water pocket.Like this, can add high-performance adjusting material and sterilant, optimize water quality.
The present invention is provided with necessary manually-operated gate and automatic valve in each inlet and outlet pipe, realize full automatic control by PLC program and housing.
1, complex optimum adopts coarse filtration, reflexive washing filter, ultrafiltration to carry out pre-treatment.At different raw water turbidities, can adopt the coarse filter in different apertures, to the former water of high turbidity, also can use the coarse filter of plural serial stage.With traditional settling apparatus, filter plant is compared, and equipment is simple, and is with low cost, changes easy.
2, adopted brand-new from back-washing method.The present invention adopts the strainer of two parallel connections and disposes two electric T-shaped valves, in the time of the backwash of default subsequent ultrafiltration, two strainers are oppositely intake by T-valve and are reached from the backwash function, a large amount of suspended substances are in time drained, its filter core need not be changed, the whole service process is automatic, and running cost is almost nil.
3, the novel energy recovery method that is adopted can be integrated recuperator and high-pressure pump, makes the power of motor of high-pressure pump only need not have 1/3 of recuperator, and equipment is simple, and operation easily reduces use cost.
Claims (5)
1. minitype sea water desalination system water treatment technique is characterized in that it may further comprise the steps:
Step 1, seawater is entered coarse filter by the submersible pump supercharging handle, to remove the foreign material of big particle diameter;
Step 2, employing two strainers in parallel are handled, and filtering accuracy is further removed the foreign material of particle diameter greater than 100um less than 100 μ m; Electric T-shaped valve is respectively disposed in water inlet place of two strainers, and in the ultra-filtration equipment backwash, by the adjustment of electric T-shaped valve, described two strainers wheel is changed to the other side's backwash;
The water outlet of step 3, described strainer is handled through ultra-filtration equipment, makes to produce water SDI value less than 3, reaches the requirement of feed water by reverse osmosis;
Step 4, ultrafiltration are produced water and are filtered through topping-up pump supercharging, security personnel's filter, by high-pressure pump hydraulic pressure are promoted to and satisfy the requirement of reverse osmosis module intake pressure, enter reverse osmosis module and handle; Reverse osmosis concentrated water is carried out energy recovery, and institute's recovered energy is used for the work of high-pressure pump.
2. a kind of minitype sea water desalination system water treatment technique as claimed in claim 1 is characterized in that in step 1, and it adopts the coarse filter of plural serial stage to carry out water treatment.
3. a kind of minitype sea water desalination system water treatment technique as claimed in claim 1, it is characterized in that in step 3 the product water of ultra-filtration equipment enters the intermediate water tank water storage, intermediate water tank divides the two-way water outlet, one the tunnel advances the topping-up pump supercharging through step 4, and another road direction ultra-filtration equipment provides backwash water.
4. a kind of minitype sea water desalination system water treatment technique as claimed in claim 1 is characterized in that in step 4, adopts axial-piston recuperator recovered energy, and the motor of high-pressure pump adopts dual-axle motor; Described axial-piston recuperator and described high-pressure pump become one, the centre is described dual-axle motor, be the high-pressure pump pump housing on one side, be recuperator on one side, the reverse osmosis unit concentrated water spout connects the dense water access port of recuperator, the high-pressure thick water that reverse osmosis membrane unit is discharged promotes the piston motion of recuperator, and piston motion produces mechanical kinetic energy and described motor comes together to drive high-pressure pump, and the dense water after releasing energy is by the discharging of recuperator discharge outlet.
5. a kind of minitype sea water desalination system water treatment technique as claimed in claim 1 is characterized in that in step 4, also adds adjusting material and sterilant in reverse osmosis produced water lines, optimizes water quality.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100592367A CN101215051B (en) | 2008-01-10 | 2008-01-10 | Minitype sea water desalination system water treatment technique |
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| CN2008100592367A CN101215051B (en) | 2008-01-10 | 2008-01-10 | Minitype sea water desalination system water treatment technique |
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| CN101215051B true CN101215051B (en) | 2011-01-19 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5762041B2 (en) * | 2011-02-17 | 2015-08-12 | 株式会社日立製作所 | Combined desalination system |
| JP5616863B2 (en) * | 2011-09-07 | 2014-10-29 | 株式会社日立製作所 | Seawater desalination system |
| CN102603035A (en) * | 2012-03-09 | 2012-07-25 | 大连理工大学 | Tidal energy unsteady boosting seawater desalinization and power generation assembly |
| CN102659272A (en) * | 2012-05-24 | 2012-09-12 | 北京赛诺水务科技有限公司 | Novel membrane-process sea water desalination and fresh water and salt preparation system and technique |
| CN104436812A (en) * | 2013-11-11 | 2015-03-25 | 高桥金属制品（苏州）有限公司 | Filter transformation device for cleaning machine |
| CN103768852B (en) * | 2014-01-20 | 2015-05-13 | 中山龙净过滤设备有限公司 | Backwashing filter |
| CN104496083A (en) * | 2014-12-25 | 2015-04-08 | 威洁（石狮）中水回用技术有限公司 | Seawater recycling and desalting system and desalting method thereof |
| CN104803516B (en) * | 2015-04-28 | 2016-10-12 | 佛山景天环境科技有限公司 | A kind of integrated container formula sea water desalting equipment and desalinating process thereof |
| CN106186409A (en) * | 2016-08-31 | 2016-12-07 | 北京三清智库科技开发有限公司 | Varying duty adjusting means and seawater desalination system and method |
| CN114650700A (en) * | 2021-01-10 | 2022-06-21 | 深圳欧特海洋科技有限公司 | Heat exchange system, data cabin and underwater data center |
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